Title:
ACOUSTIC COMMUNICATION SYSTEM AND ACOUSTIC COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/276144
Kind Code:
A1
Abstract:
This acoustic communication system comprises: a first communication device (10) having a first acoustic signal output unit (12), a first acoustic signal input unit (13), and a first signal processing unit (11); and a second communication device (20) having a second acoustic signal output unit (22), a second acoustic signal input unit (23), and a second signal processing unit (21), wherein the first signal processing unit performs a first precoding process on transmission information by using a first precoding coefficient to generate a first transmission signal (14), the first acoustic signal output unit outputs a first acoustic transmission signal (15), the second acoustic signal input unit generates a second received signal (26) based on the first acoustic transmission signal, the second signal processing unit restores transmission information from the second received signal, and the first precoding process uses a first precoding coefficient (1/(TS×RM)) based on the inverse characteristic (1/TS) of the frequency characteristic of the first acoustic signal output unit and the inverse characteristic (1/RM) of the frequency characteristic of the second acoustic signal input unit.
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Inventors:
YUMOTO NANASE (JP)
Application Number:
PCT/JP2021/025133
Publication Date:
January 05, 2023
Filing Date:
July 02, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04B11/00
Domestic Patent References:
| WO2020235078A1 | 2020-11-26 | |||
| WO2020235627A1 | 2020-11-26 |
Foreign References:
| JP2002527926A | 2002-08-27 | |||
| JP2015524180A | 2015-08-20 |
Attorney, Agent or Firm:
YAMAGATA Yoichi et al. (JP)
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